<!DOCTYPE html>
<html>
<head>
<style>
select { width: 100%; box-sizing: border-box }
</style>
</head>
<body>
<div>
<select>
  <option>This is option one</option>
</select>
</div>
<div>
<select size="3">
  <option style="visibility: hidden">This is option one</option>
</select>
<div>
</body>
</html>

  
